Light shed on mysterious particle

[FLO]

Physicists have confirmed that neutrinos, which are thought to have played a key role during the creation of the Universe, have mass.

This is the first major finding of the US-based Main Injector Neutrino Oscillation Search (Minos) experiment.

The findings suggest that the Standard Model, which describes how the building blocks of the Universe behave and interact, needs a revision.

Neutrinos are believed to be vital to our understanding of the Universe.

But scientists know frustratingly little about these fundamental particles.

The findings build on work carried out by Japanese physicists.

http://news.bbc.co.uk/1/hi/sci/tech/4862112.stm